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DAMPER REGULATOR.

Patented May 24, 1887.

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DAMPER REGULATOR. No. 363,459. Patented May 24, 1887.

UNITED STATES PATENT OFFICE.

PHILIP I'I. FOIVLER AND WILLIAM H. CHADWVIOK, OF GLOUCESTER CITY,

NEWV J ERSEY.

DAMPER-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 363,459, dated May 24, 1887.

Application iilcd March 18, 1887.

To aZZ whom it may concern:

Be it known that we, PHILIP H. FOWLER and WILLIAM H. GHADWIOK, citizens of the United States, residing at Gloucester City, in the county of Camden and State of New Jersey, have invented certain new and useful Improvements in Damper-Regulators; and we do hereby declare the following to be afull, clear, and exact description'oftheinventiomsuch as will enable others skilled in the art to which it appertains'to make and use the same.

Our invention relates to damper-regulators; and it consists in a device whereby the sensitiveness of a steam diaphragm to slight changes of steam-pressure is prevented from causing the position of the damper to be changed. The objects of the invention thus gained are a more than ordinary uniform supply of steam and a great saving of fuel.

Our invention may be applied to all damperregulators in which aloaded steam-diaphragm is used for producing the movement of a damper; and it. is specially well adapted for steam-generators and sectional boilers which have very little steam-room and are subject to sudden changes of steam-pressure, such sudden changes having the effect of keeping the damper constantly under movement, thus varying the draft and effect of the fire under the boiler to such extent that an excessive amount of fuel is required in order to produce steam fit for use.

Figure 1 represents our invention attached to a damper-regulator of known construction, and Fig. 2 shows a modified plan of the same.

The letter A in the drawings represents a steam-diaphragm of ordinary construction; B, its balancing-lever; G, a damper-motor; D, a damper, and E our improved device for' the automatic adjustment of the operation of the damper-regulator.

The steam-diaphragm A consists of a cylinder, a, with a solid bottom, a, and a flexible cover or diaphragm, a suitably attached to said cylinder. A disk, or, upon said diaphragm supports the lever B by means of a knifeedged prop, a. Steam is admitted from the boiler to the cylinder a by means of a Serial No. 231,473. (No model.)

The lever B moves in a vertically-slotted por tion,f, of a guide-stand, F, and its up and down motions are limited by means of a setscrew, f, at the upper and a set-screw, f at the lower termination of said slotted portion. A connectingrod, f connects the lever B with a piston-valve, G, in a cylinder, 0, of the damper-motor G. This cylinder 0 is provided with three ports, 0' c c", the first of which admits water under pressure from a pipe, 0, and the second discharges water into a pipe, 0, as will be seen. 1

The piston-valve O is a solid cylinder snugly fitting the cylinder 0, and provided with two flattened portions, c c which serve as water-ways in the cylinder 0 for communication between the ports c c 0. Thus, when the piston-valve stands at its lowest elevation, caused by the descending lever B, the ports 0 c are set in communication by means of the flat portion 0 of the piston-valve O, and when said piston-valve stands at its lowest elevation. caused by the ascending lever, the ports 0 c are set in communication by means of the flat portion 0 of the piston-valve C.

When the piston-valve G occupies a central elevation, as represented in the drawings, the port 0 is closed and all communication shut 01?. In the first case the water of motor-cylinder G, hereinafter described, is discharged through the pipes c 0 into the upper portion of the steam-diaphragm A. In the second case the water under pressure flows from the pipe 0 through the cylinder 0 and pipe 0" into the motor-cylinder G, where it raises a piston, g. In the third case the water is closed up between the port 0 and piston G, and the piston remains stationary. r

The cylinder G is suitably fastened to the top portion of the upper frame, A, to which latter the pipe 0 is also fastened, and through which the water passes from the pipe 0 into the cylinder G, orvice versa. The other end portion of the pipe 0 is suit-ably hung in the I V i guidestand F, as shown, and to its extended end the cylinder 0 is fastened, and thereby a firm support for the said cylinder obtained.

The pistonrod g of the piston g is provided with a chain, giwhich is fastened to alever or wheel, d, on a shaft, d. The shaft d is suitably hung in a chimney, ti and carries a damper, D, which is moved by the wheel dand chain 9". In order to move the wheel 01 forward and backward by the chain 9 the pendpiston, move the wheel d and damper D, and

expel the water from the cylinder G.

Our adjusting device E consists of an arm, e, suitably fastened to the piston-rod g, a connecting-rod, e, endless chain e and weighted sliding rod 6 The connectingrod e is suitably fastened to the chain c", as seen at e, and the chain e is suitably stretched over guidepulleys e 0 e so as to enable it to operate the horizontal rod 6. The pulleys e e may be hung in suitable projections from the cylinder Gand superframe A, as shown, and the pulley e is suitably hung to the lever B by means of an arm, I)". The chain c is kept taut by means of a spring, a The rod e is attached to the horizontal portion of the chain e, as at e, and is supported by a pulley, b suitably hung to end of lever B. The end portion of the rod 6 is provided with a weight, 6 or it may be made heavy enough to operate without the weight, as will be seen. i

\Vhen the supply of steam just meets the demand, the lever B is balanced between the abutment set-screws f f and the port 0 is closed, as shown inthe drawings. The damper D is held stationary at the position it occupied, when the port 0 may have been either closed, fully open, or at some intermediate position. If the damper is fully open, as the drawings represent, the steam pressure is likely to rise after a while, by reason of the fires brightening up. This will cause the lever B to rise and the valve 0 to open the conimunication between the ports 0 cZwhereupon the water flows from the pipe 0 through cylinder 0 and pipe 0 into the cylinder G, raises the piston g,and turns the damper D. The arm 6 rises with the rising piston-rod g, and piston 9 moves the rod 6 and the chain 6 along with it, the chain moving the rod 6 outward, thereby increasing the weight upon the lever B by degrees until this increase overcomes the resistance of the lever B and causes it to descend, lowering the valve 0 with it and'closing the port 0. The greater the increase of steam in the boiler the more weight is necessary to bring the raised lever down, and the higher will the piston 9 travel to move the rod 0 out sufficiently in order to bring the lever B down and shut the port 0 and the more will the damper reduce the draftarea in the chimney.

It will be seen that without our automatic weight-adjuster E the rising lever B will at once continue rising until stopped by the screw f, where it will remain untilthe boilerpressure is diminished, and during all thls time the ports 0 c are held in communication and the damper D is closed, cutting off all the draft from the fires instead of only a part of it.

When the decreasing boiler-pressure causes the lever B to descend,the ports 0 0 will be brought in communication, the water will be dischargedfrom the cylinder G, the piston y will descend, turn the damper D into a more open position, and cause the rod 6 to be drawn upon, by which operation the weight bearing upon the lever B is gradually diminished, finally enabling it to rise again, closing the port 0 and causing the damper to be held in the position into which in the meantime it had been moved. Here, again, as is easily seen, our invention does not fully reverse the position of the damper, as other damper-regulators do, but the reverse movement is stopped sooner or later, according to the extent of decrease in steam-pressure. p

The result of the use of our invention is a more uniform boiler-pressure than has ever before been obtained from other damper-regulators, very easy wear and tear on boiler and machinery, a very fair percentage of saving in fuel, and a great assurance of security to the attendants of the boilers and engines.

In some instances we propose to adopt the construction shown by the modification, Fig. 2, as this form will be foundpreferable with a majority of the constructions of damper-regulators. In this modification the rod 6 is provided with a rack, e, and the rod 0 with a similar rack, e both racks meshing with a suitable pinion, e. The rack-e is held in gear with the pinion e by means of a guide pin, a, in the superframe A, and the rack c by a guide-pin, a. It is readily seen fromthe drawings that the reciprocating motion of both rods in this modification is substantially the same as in the previously-described construc- ICO tion shown in Fig. 1, and that the principle of the operation of the invention is substantially the same in both the embodiments shown.

Whenever the cylinder G can be placed directly over the diaphragm A, the modification shown in Fig. 2 will be the most practical construction; but when the cylinder G cannot be so conveniently placed the chain e may be resorted to.

What we claim as our invention, and desire to secure by Letters Patent, is

1. In a damper-regulator, the combination of a steam-diaphragm, A, damper-motor 0,

lever B, and automatic regulator E, comprising a rectilinear-moving rod, c whereby a variableload is produced by the damper-motor In testimony whereof weaffix our signatures 10 upon said lever, substantially as and for the in presence of two witnesses. purpose described.

2. Incombinationwith an ordinarydamper- PHILIP H. FOWLER. 5 regulator having a steam-diaphragm, A, lever WILLIAM H. CHADWIGK B, and water-motor O, the arm 6, fastened to piston rod 0, chain 0 and rectilinear-mov- Witnesses: ing weighted rod 0 substantially as and for CHAS. H. FOWLER,

the purpose described. ALONZO G. HARRISON. 

